Give the chemical symbol for the element with the ground‑state electron configuration [ ar ] 4 s 2 3 d 1 . symbol: determine the quantum numbers n and ℓ and select all possible values for m ℓ for each subshell of the element. 4 s n = 4 s ℓ = the possible values of m ℓ for the 4 s subshell are 0 − 1 , 0 , + 1 − 2 , − 1 , 0 , + 1 , + 2 − 3 , − 2 , − 1 , 0 , + 1 , + 2 , + 3 3 d n = 3 d ℓ = the possible values of m ℓ for the 3 d subshell are − 1 , 0 , + 1 − 2 , − 1 , 0 , + 1 , + 2 − 3 , − 2 , − 1 , 0 , + 1 , + 2 , + 3 0

Sc (Scandium) has the given electronic configuration.

Explanation:

The given electronic configuration is [Ar].

The last electron enters the d-subshell and hence is a d-block element known as Scandium with chemical symbol Sc.

For 4s subshell

n=4,l=0 and m ranges from -l to +l so m=0.

For 3d subshell

n=3,l=2 and m ranges from -l to +l so m can take values -2,-1,0,+1,+2

Note:

l values for subshells:

s : 0

p : 1

d : 2

f : 3 and so on.

i would say b

explanation:

but i think i would need more information than that

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.